*{
    margin:0;
    padding:0
}
.tabbox{
    width: 300px;
    height: 300px;
    border:1px solid #000;
    display: flex;
    margin:50px auto;
}
.tabboxli{
    flex:1;
    list-style: none;
    height: 30px;
    line-height: 30px;
    text-align: center;
    cursor: pointer;
}
.tabboxliactive{
    flex:1;
    list-style: none;
    height: 30px;
    line-height: 30px;
    text-align: center;
    cursor: pointer;
    border-bottom: 1px solid coral;
    color: coral;
}